The behinds of 18 jean-clad female models bent over from the waist as they stand on three rows of risers while surrounding heiress Gloria Vanderbilt who is the backer of this topselling line of signature denims.

Photo: Evelyn Floret, Time & Life Pictures/Getty Image

The behinds of 18 jean-clad female models bent over from the waist...

The behinds of 18 jean-clad female models bent over from the waist... Photo-4568543.61645 - SFGate

Image 10 of 55

A young woman models a pair of hot pants in 1975.

Photo: Tim Graham, Getty Images

A young woman models a pair of hot pants in 1975.

A young woman models a pair of hot pants in 1975. Photo-4568494.61645 - SFGate

1955: American actor James Dean (1931 - 1955) leaning against a dressing room trailer with his shirt open to the waist while smoking a cigarette on the set of director George Stevens's film, 'Giant,' in which he starred.

These women in the United States are hanging their jeans on a laundry line in 1945. With the end of World War II and the American intervention around the world, the blue jean gradually began to be marketed everywhere.

Photo: Keystone-France, Gamma-Keystone Via Getty Images

These women in the United States are hanging their jeans on a...

These women in the United States are hanging their jeans on a... Photo-4568593.61645 - SFGate

Image 51 of 55

A United States Army soldier wearing blue denim fatigues, circa 1940. He is carrying an M-1928 Infantry haversack and using an EE-8 field telephone.

Photo: Galerie Bilderwelt, Getty Images

A United States Army soldier wearing blue denim fatigues, circa...

A United States Army soldier wearing blue denim fatigues, circa... Photo-4568584.61645 - SFGate